Difference between revisions of "Template:Eye Timeline table"

From Embryology
m
m
Line 10: Line 10:
 
|-bgcolor="F5FAFF"
 
|-bgcolor="F5FAFF"
 
| {{CS11}}
 
| {{CS11}}
| right and left optic primordia meet at the optic chiasma forming a U-shaped rim.
+
| Right and left optic primordia meet at the optic chiasma forming a U-shaped rim.
 
|-
 
|-
 
| {{CS12}}
 
| {{CS12}}
Line 19: Line 19:
 
|-
 
|-
 
| {{CS14}}
 
| {{CS14}}
| (about 32 days) the lens placode is indented by the lens pit, cup-shaped and still communicates with the surface by a narrowing pore.
+
| (about 32 days) Lens placode is indented by the lens pit, cup-shaped and still communicates with the surface by a narrowing pore.
 
|-bgcolor="F5FAFF"
 
|-bgcolor="F5FAFF"
 
| {{CS15}}
 
| {{CS15}}
| (about 33 days) the lens pit is closed. The lens vesicle and optic cup lie close to the surface ectoderm and appear to press against the surface.  
+
| (about 33 days) Lens pit is closed. The lens vesicle and optic cup lie close to the surface ectoderm and appear to press against the surface.  
 
|-
 
|-
 
| {{CS16}}
 
| {{CS16}}
Line 34: Line 34:
 
|-bgcolor="F5FAFF"
 
|-bgcolor="F5FAFF"
 
| {{CS19}} - {{CS22}}
 
| {{CS19}} - {{CS22}}
| the eyelid folds develop into the eyelids and cover more of the eye as the palpebral fissure takes shape. The upper and the lower eyelids meet at the outer canthus in Stage 19.  
+
| Eyelid folds develop into the eyelids and cover more of the eye as the palpebral fissure takes shape. The upper and the lower eyelids meet at the outer canthus in Stage {{CS19}}.  
 
|-
 
|-
 
| {{CS20}}
 
| {{CS20}}
| The lens cavity is lost and a lens suture begins to form. The inner canthus is established.  
+
| Lens cavity is lost and a lens suture begins to form. The inner canthus is established.  
 
|-bgcolor="F5FAFF"
 
|-bgcolor="F5FAFF"
 
| {{CS23}}
 
| {{CS23}}

Revision as of 00:40, 1 June 2018

Human Eye Development
Carnegie Stage Event
10 optic primordia appear.
11 Right and left optic primordia meet at the optic chiasma forming a U-shaped rim.
12 optic neural crest reaches its maximum extent and the optic vesicle becomes covered by a complete sheath,
13 By the end of the fourth week the optic vesicle lies close to the surface ectoderm. Optic evagination differentiation allows identification of optic part of retina, future pigmented layer of retina, and optic stalk. The surface ectoderm overlying the optic vesicle, in response to this contact, has thickened to form the lense placode.
14 (about 32 days) Lens placode is indented by the lens pit, cup-shaped and still communicates with the surface by a narrowing pore.
15 (about 33 days) Lens pit is closed. The lens vesicle and optic cup lie close to the surface ectoderm and appear to press against the surface.
16 (37 days) Growth of the lens body results in a D-shaped lens cavity. Perilental blood vessels (tunica vasculosa lentis) are visible. Prior to the development of the eyelids, one small sulcus or groove forms above the eye (eyelid groove) and another below it.
17 - 19 Retinal pigment is visible and the retinal fissure is largely closed. Eyelids grooves deepen, eyelid folds develop, first below, and then above, the eye.
18 Mesenchyme invades the region between the lens epithelium and the surface ectoderm.
19 - 22 Eyelid folds develop into the eyelids and cover more of the eye as the palpebral fissure takes shape. The upper and the lower eyelids meet at the outer canthus in Stage 19.
20 Lens cavity is lost and a lens suture begins to form. The inner canthus is established.
23 retina comprises the pigmented layer, external limiting membrane, proliferative zone, external neuroblastic layer, transient fiber layer, internal neuroblastic layer, nerve fiber layer, and internal limiting membrane. Eyelids closure is complete (Note - shown as still open in the Kyoto embryo).
Data from a study of human embryonic carnegie stages[1] and other sources.
Week: 1 2 3 4 5 6 7 8
Carnegie stage: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
  1. Pearson AA. (1980). The development of the eyelids. Part I. External features. J. Anat. , 130, 33-42. PMID: 7364662